
def mon = new Weekday('Mon')
def fri = new Weekday('Fri')
def worklog = ''
for (day in mon..fri) {
	worklog += day.toString() + ' '
}
println worklog
println fri <=> mon
println fri.next()
println fri.next().next()
println fri.next().next().previous()
println mon.previous()
println mon.previous().previous()
println mon.previous().previous().previous()